Abstract: An apparatus for removing magnetically attractable particles from a fluid in combination with an associated filter is disclosed. The filter, typically an oil filter, has a magnetically attractable outer wall enclosing an internal chamber. The outer wall has an inner surface and an outer surface. The fluid circulates through the internal chamber. The apparatus includes a magnetic member having a plurality of regions of alternating polarity, the magnetic member being retained against the outer surface of the outer wall, a flux apparatus for directing magnetic flux within the internal chamber, and an opening clamp. The method includes the steps of opening the opening clamp, removing the magnetic member from the filter, replacing the filter with a second filter, placing the magnetic member onto the second filter, and closing the opening clamp.